Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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<text>
<body>
<chap>
<p type="main">
<s id="s.000201">
<arrow.to.target n="marg45"/>
<lb/>
portio K grauitas abſoluta pilæ aqueæ C quæ æqua­
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lis ſit ipſi AB, ſit que pila C contenta intra eiuſdem̨
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aquæ RO profunditatem, vel in altera fiſtula inuerſi
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ſiphonis, quæ cum reliqua continuetur, poſtea eadem
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pila AB filo DA ab aliqua potentia I ſuſpenſa in me­
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dio aquæ fixè retineatur. </s>
<s id="s.000202">modò ſi poſſibile eſt pilą
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aquea C nil prorsùs ponderet in ipſamet aqua, igitur
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in ſiphone, vel in libra DE in eius puncto medio F
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fulta pila aquea C ſuſpenſa à termino E, quæ
<expan abbr="nullã">nullam</expan>
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prorſus grauitatem exercere in aqua ſupponitur,
<expan abbr="nũ-quam">nun­
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quam</expan>
imminuet pondus contrapoſitæ pilæ AB colli­
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gatæ termino libræ D, propterea quòd nihilum ab
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aliquo pondere ſubtractum ipſum nullo pacto immi­
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nuit; nec pariter denſitas, & tenacitas aquæ gradum
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ponderis pilæ AB diminuere poteſt, propterea quòd
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illa reſiſtentia potis eſt retardare, & impedire mo­
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tum, non autem vim, quam graue AB in quiete con­
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ſtitutum exercet comprimendo; videmus enim, quòd
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pila ferrea quieſcens ſiue fulciatur à molli cera, ſiue
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à rigido adamante, ſemper eadem vi comprimit, ſci­
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licet menſurata à gradu eius
<expan abbr="põderis">ponderis</expan>
. </s>
</p>
<p type="margin">
<s id="s.000203">
<margin.target id="marg45"/>
Cap. 3. flui­
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dum in ſuo
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toto quie­
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ſcens pon­
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derat.</s>
</p>
<p type="main">
<s id="s.000204">His poſitis ſequitur, quòd pila fer­
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rea AB pendula intra aquam exerce­
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bit integram ſuam grauitatem IK,
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ſcilicet eam, quam in aere exerce­
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bat, ſed hoc eſt falſum, imminuitur
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enim præcisè pro menſura ponderis
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K ſcilicet molis aqueæ C, & ei relin­
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quitur tantummodò pondus I, ſcili-</s>
</p>
</chap>
</body>
</text>
</archimedes>